Brake-shoe key.



Patented Nov. 23, 1909.

U N SMITH BRAKE SHOE KEY. APPLICATION FILED MAB. s, 1909.

67/4/9255 AldM/r/x Inventor,

Witnesses:

Attorneys CHARLES NEAL SMITH, OF ST. THOMAS, ONTARIO, CANADA.

BRAKE-SHOE KEY.

To all whom it may concern:

Be it known that I, CHARLES N. SMITH, a subject of the King of Great Britain, residing at St. Thomas, county of Elgin, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Brake-Shoe Keys; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to brake shoe keys, such as are adapted to removably secure a brake shoe to its head.

The main object of the present invention 1s to provide a key which will lock the shoe andhead securely together and will not work out of place by vibration of the shoe, although it may be very readily driven into 100 ng position and easily removed at will.

In order to more clearly disclose the construction, operation and use of the invention, reference should be had to the accompanying drawings forming part of the present application.

Throughout the several figures of the drawings, like reference characters designate the same parts.

In the drawings: Figure l is a perspective of the brake shoe head, with the key in posltion; Fig. 2 is a perspective of the brake shoe; Fig. 3 is a. side view of the key; and, Fig. 4 is a plan view of the key.

The brake shoe head 1 is provided with two perforated lugs 2, and has recesses cut into its ends. The brake shoe 3 has a single lug 4, adapted to fit between the lugs 2 and provided with a perforation adapted to be alined with the perforations of the lugs 2. The ends of the brake shoe are notched to cooperate with the notched ends of the brake shoe head 1.

In order to lock the head and shoe together, a key 5 is provided. This key has the general outline of a long, tapering wedge with a solid point 6, and spring arm 7. The extreme upper ends of these arms are defiected to form abrupt shoulders 8 and finger grips 9. A short distance below the shoulders 8, the arms are stamped out or bent to form a second set of rounded shoulders 10. The shoulders 8 are adapted to rest upon the Specification of Letters Patent. Applicaticn filed March 6, 1909.

Serial No. 481,851. I

I outer face of the end of the brake shoe head,

while the shoulders 10 are adapted to rest against the upper face thereof. In this way, the shoulders 8 limit the insertion of the key, while the shoulders 10 prevent the withdrawal of the same.

The operation of the invention is as follows: The brake shoe 3 is placed in such position that the lug l lies between the lugs 2 and the perforations through said lugs are alined. The point of the key 5 is then passed through the notches in the brake shoe and brake shoe head and through the perforated lugs of the same until the shoulders 10 engage the end of the brake shoe head and brake shoe. The grips 9 are then grasped and the arms 7 forced together until the shoulders 10 may be passed through the notches in the brake shoe head and brakeshoe. The key is then further inserted until the shoulders 8 engage the outer face of the end of the brake shoe head and the arms 7 are allowed to swing apart so that the shoulders 1O engage against the under face of the brake shoe head. Thus the brakeshoe head and brake shoe will be solidly, though d'etachably, locked together, and the locking key will be secured against any possible movement.

It is clear that changes may be made in the construction,arrangement and disposition of the several parts of the invention, without in any way departing from the field and scope of the same, and it is meant to in clude all such within this application, wherein only a preferred form has been disclosed.

Having thusfully described my invention, What I claim as new, and desire to secure by Letters Patent, is

1. A brake shoe key of the character described, comprising a wedge-shaped member provided with spring arms each having a shoulder adapted to limit the insertion of the key, and a shoulder adapted to prevent accidental removal of the same.

2. A brake shoe key of the character described, comprising a wedge-shaped member provided with spring arms each having a shoulder adapted to limit the insertion of the key, and a second shoulder adapted to prevent accidental removal of the same.

3. A brake shoe key of the character'de- Patented Nov. 23, 1909.

scribed, comprising a wedge-shaped member having arms each provided with a shoulder adapted to prevent accidental removal of the key, and a second shoulder adapted to limit '5 the inserti which the arms allow insertion.

on of the key, and a. finger grip may be drawn together to in witness whereof Thave hereunto set my hand in the presence of two witnesses.

CHARLES NEAL SMITH.

Witnesses:

GnADYs STAN ON, GEORGE W. LAl IGD'EN. 

